Energy & Fuels最新文献

{"title":"Influence of Injection Parameters of Black Nanosheets on Enhancing Oil Recovery Performance in Low-Permeability Reservoirs","authors":"Daoyi Zhu*,&nbsp;Si Guo,&nbsp;Jiamai Lu,&nbsp;Yongliang Yang,&nbsp;Tao Zhang,&nbsp;Jiong Zhang,&nbsp;Yingqi Gao,&nbsp;Honggen Tan,&nbsp;Hongbin Cheng and Hongyu Li,&nbsp;","doi":"10.1021/acs.energyfuels.5c0054610.1021/acs.energyfuels.5c00546","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00546https://doi.org/10.1021/acs.energyfuels.5c00546","url":null,"abstract":"<p >With the in-depth development of oil and gas resources, low-permeability reservoirs have gradually become a research hotspot for oilfield production increase targets. Increasing the stimulated reservoir volume (SRV) using fracturing is an important method for developing low-permeability reservoirs. However, the effect of water flooding development alone after fracturing remains limited. The black nanosheet (BN) oil displacement system, which has both profile control and oil displacement effects, is currently a popular method for developing unconventional reservoirs. It offers advantages such as a good imbibition oil displacement effect, stable chemical properties, and high sweep efficiency. However, there are few studies on its injection performance and oil displacement mechanism in low-permeability (10 × 10^–3 μm²) and ultralow-permeability (1 × 10^–3 μm²) reservoirs. In this study, the cationic-modified black nanosheet was taken as the research subject. Core displacement experiments and nuclear magnetic resonance analysis experiments designed through orthogonal design were used to study the influence mechanism of different injection parameters on the injection performance and oil displacement effect of the modified black nanosheet system. Results show that the black nanosheet significantly improved its injection performance compared with water flooding and enhanced the oil recovery degree. When the injection concentration was 0.002 wt %, the injection rate was 0.2 mL/min, the injected pore volume was 0.5 PV, and the core sample permeability was 1 × 10^–3 μm², the increase in oil recovery degree by black nanosheet after primary water flooding was the largest, reaching 14.13%OOIP (original oil in place). The nuclear magnetic resonance <i>T</i>₂ spectrum further confirmed that under the above injection parameter conditions, black nanosheets could enter more tiny pores and displace more crude oil compared to water. More crude oil in large pores was displaced due to the reduction of phase boundary tension (i.e., capillary force). The research results of this paper provide a theoretical analysis basis for optimizing the injection parameters of the black nanosheet and improving its profile control and oil displacement effect in low-permeability reservoirs.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6241–6250 6241–6250"},"PeriodicalIF":5.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"X-ray Transient Absorption Spectroscopy Reveals Light Responses of Cobalt Centers in Co-Pi OER Catalytical Devices under Electrochemical Biases","authors":"Justin M. Hoffman,&nbsp;Tyler N. Haddock,&nbsp;Michael W. Mara,&nbsp;Brian T. Phelan,&nbsp;Zachary J. Mast,&nbsp;Evan H. Oriel,&nbsp;Burak Guzelturk,&nbsp;Jin Yu,&nbsp;Cunming Liu,&nbsp;Richard D. Schaller,&nbsp;Emily A. Sprague-Klein,&nbsp;George C. Schatz,&nbsp;Alex B. F. Martinson,&nbsp;Xiaoyi Zhang,&nbsp;David M. Tiede and Lin X. Chen,&nbsp;","doi":"10.1021/acs.energyfuels.4c0643310.1021/acs.energyfuels.4c06433","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06433https://doi.org/10.1021/acs.energyfuels.4c06433","url":null,"abstract":"","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6703–6707 6703–6707"},"PeriodicalIF":5.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of Organic–Inorganic Heterojunction Hybrid Solar Cells with Embedded Plasmonic Nanocrystals: Recent Advances and Future Perspectives","authors":"Thompho Ravele,&nbsp;Xolile G. Fuku and Mesfin Abayneh Kebede*,&nbsp;","doi":"10.1021/acs.energyfuels.4c0551710.1021/acs.energyfuels.4c05517","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c05517https://doi.org/10.1021/acs.energyfuels.4c05517","url":null,"abstract":"<p >Research into organic–inorganic heterojunction hybrid solar cells was initially driven by the promise of combining the best properties of organic and inorganic materials to achieve higher power conversion efficiencies. However, despite the early optimism, it has become clear that simply creating organic–inorganic heterojunctions does not necessarily lead to the significant enhancements in power conversion efficiency that were anticipated. This review delves into one promising avenue for overcoming these limitations: plasmonic enhancement. The review provides analysis of the mechanisms behind plasmonic effects, including near-field localization, far-field scattering, and hot-electron energy transfer, and discusses how these effects can significantly enhance the performance of organic–inorganic hybrid solar cells. It also addresses the ongoing challenges of integrating plasmonic materials effectively and optimizing their performance within hybrid solar cell devices. Ultimately, the review aims to shed light on how plasmonic enhancement could be a key strategy for achieving higher efficiencies and realizing the full potential of organic–inorganic heterojunction hybrid solar cells.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6026–6044 6026–6044"},"PeriodicalIF":5.2,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.energyfuels.4c05517","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SiC-Supported Polymetallic Oxide Catalysts for Enhanced Low-Temperature SCR Denitration","authors":"Haili Duan,&nbsp;Fushuai Zhang,&nbsp;Maorun Zhang,&nbsp;Tianlin Ma,&nbsp;Zhiling Xin*,&nbsp;Qingwei Gao* and Jiantao Zai*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0075410.1021/acs.energyfuels.5c00754","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00754https://doi.org/10.1021/acs.energyfuels.5c00754","url":null,"abstract":"<p >The increasing need to control NOx emissions from industrial processes and vehicles has driven the development of efficient low-temperature SCR catalysts. In this study, FeCoMnCeSm catalysts were synthesized using an ultrasound-assisted impregnation method and supported on SiC. The resulting FeCoMnCeSm/SiC catalyst exhibited excellent low-temperature denitration performance and superior resistance to H₂O and SO₂ poisoning. The FeCoMnCeSm/SiC catalyst achieved 80% NO conversion at 80 °C and full conversion in the 100–200 °C range. Comprehensive characterization of the catalysts using XRD, BET, XPS, H₂-TPR, and NH₃-TPD revealed that the SiC-supported catalyst had higher porosity and a greater number of surface acidic sites, leading to improved oxygen chemisorption, NH₃/NO adsorption, and enhanced redox properties. The catalyst also maintained a stable number of acidic sites after SO₂ exposure, underscoring its durability in harsh industrial environments. These findings highlight the potential of FeCoMnCeSm/SiC as a highly efficient and robust catalyst for low-temperature SCR applications.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6400–6411 6400–6411"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of the RTAPK Core Analysis Method to Address Problems Facing Field-Based Characterization and Evaluation of Unconventional Reservoirs","authors":"Christopher R. Clarkson,&nbsp;Niloufar Rahimof,&nbsp;Mohammadebrahim Shabani,&nbsp;Chengyao Song*,&nbsp;Aamir Bashir,&nbsp;Amin Ghanizadeh and Adnan Younis,&nbsp;","doi":"10.1021/acs.energyfuels.4c0571210.1021/acs.energyfuels.4c05712","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c05712https://doi.org/10.1021/acs.energyfuels.4c05712","url":null,"abstract":"<p >The rate-transient analysis (RTA), porosity, and permeability (“RTAPK”) core analysis method reproduces conditions under which wells completed in unconventional reservoirs are operated in the field with the data analyzed similarly. As with RTA methods applied to wells in the field, RTAPK data analysis involves (1) identification of flow regimes and (2) application of models to extract parameters of interest. RTA of field data has faced many challenges when applied to unconventional reservoirs, including (1) nonunique flow regime interpretations, which affect model selection; (2) uncertain reservoir/fracture property estimates as a result of (1); and (3) accounting for the effects of interwell communication. RTAPK can be used to address some of these challenges in the laboratory. To address challenges (1) and (2), low-permeability reservoir samples with different degrees of permeability heterogeneity (parallel to flow) caused by bedding/laminations were studied using RTAPK to assess the impact on flow-regime signatures and permeability estimates. Low to moderate levels of permeability heterogeneity resulted in a flow-regime sequence similar to hydraulically fractured wells completed in homogeneous reservoirs. However, a high permeability heterogeneity sample yielded a flow-regime sequence resembling field signatures previously interpreted to be caused by fracture complexity. The laboratory results suggest an alternative interpretation for the latter. To address challenge (3), interwell communication in the lab was simulated using RTAPK. A new apparatus allowing flow from both sides of the core plug was constructed for this purpose. The results, as analyzed with flow-regime identification and contacted fluid-in-place plots for the parent well, resembled simulated cases of parent–infill well communication. Finally, relevant to the energy transition, RTAPK was used to study water production from a low-permeability sandstone core plug, applicable to the evaluation of enhanced geothermal systems, and hydrogen production from a coal core plug, applicable to the evaluation of hydrogen storage in deep subsurface coal reservoirs.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6261–6279 6261–6279"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nb-Doped TiO2 Supports Ir Nanoparticles with Strong Metal–Support Interaction as Bifunctional Electrocatalysts for Acidic Overall Water Splitting","authors":"Sibin zhu,&nbsp;Siwu Yi,&nbsp;Xiaopeng Zhang,&nbsp;Lun Yu,&nbsp;Zilan Jiang,&nbsp;Xufeng Tang,&nbsp;Shuodan Li,&nbsp;Letian Li,&nbsp;Yadong Wang* and Haolin Tang*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0004010.1021/acs.energyfuels.5c00040","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00040https://doi.org/10.1021/acs.energyfuels.5c00040","url":null,"abstract":"<p >The practical application of acidic water splitting is limited by the lack of bifunctional catalysts that combine high activity, long-term stability, and reduced noble metal usage. To address this, we designed an Ir-based catalyst via a two-step hydrothermal synthesis, where ultrafine Ir nanoparticles (NPs) are anchored on Nb-doped TiO₂ (Ir NPs/Nb–TiO₂) to exploit strong metal–support interactions and electronic modulation. The optimized catalyst exhibits outstanding bifunctional performance in 0.5 M H₂SO₄, requiring low overpotentials of 37 (hydrogen evolution reaction) and 253 mV (oxygen evolution reaction) at 10 mA cm^–2, outperforming most reported Ir-based catalysts. Remarkably, Ir NPs/Nb–TiO₂ demonstrates exceptional stability, with almost no change in potential after 40 h of chronoamperometric testing for both oxygen evolution reaction and hydrogen evolution reaction. Furthermore, as a bifunctional catalyst for overall water splitting, it achieves a current density of 10 mA cm^–2 at a low cell voltage of 1.531 V, with negligible loss in catalytic activity after 40 h of chronoamperometric testing. Density functional theory calculations reveal that Nb doping enhances electron transfer to Ir, optimizing oxygen intermediate adsorption while strong metal–support interaction prevents Ir dissolution. This work offers a high-performance catalyst for acidic water splitting and a general framework for minimizing noble metal usage through synergistic electronic and interfacial engineering.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6505–6516 6505–6516"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyaniline-Induced Prepassivation and Postactivation Strategy to Improve Lithium Ion Storage in Multilayer Silicon-Based Anodes","authors":"Xinyuan Wang,&nbsp;Xinli Jiang,&nbsp;Hualan Wang*,&nbsp;Yinglai Wang,&nbsp;Chaojun Lei,&nbsp;Gaole Dai,&nbsp;Yu Zhao,&nbsp;Li-Wen Xu,&nbsp;Chunqi Sheng and Xiaogang Zhang*,&nbsp;","doi":"10.1021/acs.energyfuels.5c0052510.1021/acs.energyfuels.5c00525","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.5c00525https://doi.org/10.1021/acs.energyfuels.5c00525","url":null,"abstract":"<p >Silicon nanosheets (Si-NSs) are considered one of the most competitive anode materials for lithium ion batteries. However, the chemical synthesis route of Si-NSs is usually time-consuming and environmentally unfriendly, with uncontrollable surface defects. Besides, the traditional utilization rate of Si-NSs heavily depends on exfoliation yields, which are relatively low due to the strong interlayer van der Waals forces between adjacent Si-NS layers. Therefore, it is a great challenge to develop new strategies for preparing Si-NSs with controlled defects, high utilization rates, and improved performance. This work proposes a polyaniline (PANI)-induced prepassivation and postactivation strategy to regulate defects and improve the utilization rate of Si-NSs without exfoliation via an electrochemical route. When used as an anode material, the activated PANI@Si-NSs delivered an initial specific capacity of 1521.5 mAh g^–1, much higher than 444.3 mAh g^–1 of Si-NSs. The as-prepared Si-NSs are physically passivated and well-protected from overoxidation by presynthesized PANI during the electrochemical etching of CaSi₂. Besides, Si-NSs show optimized and accelerated intralayer and extra-layer lithium ion and electron transport via the induction and activation of PANI. The proposed strategy is demonstrated to be feasible and effective, indicating promising prospects toward high-performance anode materials.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6633–6643 6633–6643"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Hydrogen from Biomass: What Is Its Potential Contribution to the European Defossilization Targets?","authors":"Alessio Riorda,&nbsp;Viviana Negro,&nbsp;Antonio Marco Pantaleo*,&nbsp;Francesco Matteucci,&nbsp;Nilay Shah and David Chiaramonti*,&nbsp;","doi":"10.1021/acs.energyfuels.4c0508510.1021/acs.energyfuels.4c05085","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c05085https://doi.org/10.1021/acs.energyfuels.4c05085","url":null,"abstract":"<p >This study investigates the potential role of hydrogen production from biomass in the EU hydrogen objectives. With the EU aiming to produce 10 million tons of renewable hydrogen by 2030 and significantly scaling this production by 2050, diverse hydrogen production pathways must be explored. Our research focuses on assessing whether biomass-derived hydrogen can serve as a viable and substantial component of the hydrogen production mix alongside and complementing established methods such as electrolysis powered by renewable electricity. Through a comprehensive literature review, the main hydrogen production pathways from biomass have been assessed, including thermochemical and biological methods, with an emphasis on hydrogen yield, production costs, and technology readiness levels (TRLs). The work also considers the availability of biomass resources and potential production scenarios for 2030 and 2050. Our findings suggest that biomass-derived hydrogen can meaningfully contribute to the defossilization of the hydrogen sector, particularly in the midterm scenario for 2030. The analysis suggests that biomass has the potential to contribute a substantial share of the EU’s 2030 hydrogen target, ranging from under 0.1 Mt to over 16 Mt per year. Biomass-derived hydrogen offers additional flexibility and security of supply in the transition to a sustainable hydrogen economy, other than the possibility to benefit from negative emissions in some cases and added value from the coproduction of defossilized materials and chemicals, relying on domestic resources available in Europe.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6412–6425 6412–6425"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.energyfuels.4c05085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Boosted Photocatalytic Water Oxidation over BaTaO2N Produced from Perovskite Oxides Based on Photoinduced Charge Carriers","authors":"Junie Jhon M. Vequizo,&nbsp;Kosaku Kato,&nbsp;Shanshan Chen,&nbsp;Takashi Hisatomi,&nbsp;Zheng Wang,&nbsp;Tsuyoshi Takata,&nbsp;Akira Yamakata and Kazunari Domen*,&nbsp;","doi":"10.1021/acs.energyfuels.4c0636410.1021/acs.energyfuels.4c06364","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06364https://doi.org/10.1021/acs.energyfuels.4c06364","url":null,"abstract":"<p >Photocatalytic water splitting utilizing visible-light-active materials holds promise for a greener and more facile way to generate H₂ and O₂. Herein, we analyze the strong potential of BaTaO₂N for oxygen generation via water splitting based on a fundamental understanding of the behavior of photoinduced charge carriers. We found that the photoexcited electrons in BaTaO₂N undergo trapping at trap states 0.4 eV below the conduction band minimum. This electron trapping occurs following significant electron–hole recombination within 200 ps after excitation. We also identified the important role of oxygen evolution cocatalysts not only for effectively enhancing charge-carrier separation but also for reducing the trap-state energy level from 0.4 to 0.1 eV. Overall, the combination of sluggish charge-carrier recombination and effective and rapid hole transfer to CoO_<i>x</i> resulted in an almost 100-fold increase in the population of accumulated long-lived electrons in defect-rich BaTaO₂N. This observation is consistent with the high O₂ evolution rate exhibited by this material. These findings open up new directions and strategies to capitalize on the properties of BaTaO₂N and further allow the development of highly effective oxynitride-based materials for water splitting.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6584–6591 6584–6591"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mechanism and Test Validation of a Self-Locking Jet-Crushing Tool for Marine Natural Gas Hydrate Exploration and CO2 Sequestration","authors":"Xiaohui Jiang,&nbsp;Guorong Wang,&nbsp;Li Mo,&nbsp;Yang Tang*,&nbsp;Yulin Zhang and Bensheng Huang,&nbsp;","doi":"10.1021/acs.energyfuels.4c0600610.1021/acs.energyfuels.4c06006","DOIUrl":"https://doi.org/10.1021/acs.energyfuels.4c06006https://doi.org/10.1021/acs.energyfuels.4c06006","url":null,"abstract":"<p >This study proposes a novel self-locking pressure-controlled jet-crushing tool (SPJT) designed for solid-state fluidization mining of natural gas hydrate (NGH) and cavity creation during deep-sea CO₂ sequestration. The SPJT allows efficient switching between jet crushing and normal drilling, reducing the operation time in NGH reservoirs. The opening and closing of the jet-crushing nozzles are controlled by the movement of the slide core, which is regulated by the fluid flow rate from the offshore pump. Once the jet-crushing nozzles open, the slide core can achieve self-locking to maintain stability despite fluid fluctuations. Numerical simulations were conducted to analyze the impact of structural dimensions on the slide core’s internal pressure, axial force, and the motion laws of self-locking mechanisms under various flow-loading modes. Based on simulation results and actual working conditions, the optimal structural parameters of the slide core were identified: 45 mm inlet diameter, 30° inlet angle, and 470 L/min inlet flow rate. The self-locking mechanism can achieve both self-locking and unlocking under different flow-loading schemes with a rapid increase in the drilling fluid flow rate for self-locking and a gradual decrease for unlocking. An engineering prototype of the SPJT was fabricated, followed by indoor tests and land well experiments to verify the feasibility of the design and its performance. The test results showed that the nozzles remain closed under conventional borehole drilling flow rates but are fully open when the flow rate reaches 455 L/min. The self-locking mechanism reliably switches between the locking and unlocking states. The relative error between the tool’s self-locking flow rate and the design flow rate of 470 L/min is only 3.19%, within acceptable limits. This study provides new insights for designing remote-intelligent hydrate mining tools, optimizing the mining process, and enabling controllable seabed CO₂ sequestration, thus accelerating the commercial exploitation of gas hydrates.</p>","PeriodicalId":35,"journal":{"name":"Energy & Fuels","volume":"39 13","pages":"6671–6685 6671–6685"},"PeriodicalIF":5.2,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}